Knowing the right time to plant turnips in Michigan is the key to a successful harvest. For Michigan’s growing season, timing is everything due to our unique climate. This cool-weather crop thrives when planted in the cool soil of spring and again in the late summer. Getting your planting dates right means you’ll enjoy sweet, tender roots and flavorful greens without the bitterness that comes from summer heat.
This guide will walk you through the best planting windows, variety selection, and simple care tips tailored for Michigan gardeners. Let’s get your turnips in the ground at the perfect moment.
When To Plant Turnips In Michigan
Michigan’s climate, with its distinct frost dates and seasonal shifts, offers two excellent planting periods for turnips. They are a true dual-season crop here.
The first opportunity is in the spring. You want to plant as soon as the soil can be worked. This is typically 2 to 4 weeks before your area’s average last spring frost date. For much of Lower Michigan, this falls in late April to early May. In the Upper Peninsula, aim for mid to late May. The goal is to harvest before the peak summer heat arrives, which can make turnips woody and pungent.
The second, and often best, planting time is in late summer for a fall harvest. This is when turnips really shine in Michigan. Plant seeds about 6 to 8 weeks before your average first fall frost. For most of the state, this means sowing seeds from early August to early September. Cool autumn temperatures sweeten the roots and produce lush greens.
Understanding Your Michigan Frost Dates
Your local frost dates are your most important calendar. Turnips can tolerate a light frost, which actually improves their flavor. Here’s a general guide based on region:
* Southeast Michigan (Detroit, Ann Arbor): Last frost around May 5. First frost around October 10. Spring plant: mid-April. Fall plant: mid-August.
* Southwest Michigan (Grand Rapids, Kalamazoo): Last frost around May 10. First frost around October 5. Spring plant: late April. Fall plant: early August.
* Central/Northern Lower Michigan (Traverse City, Alpena): Last frost around May 20-30. First frost around September 25 – October 5. Spring plant: early May. Fall plant: early to mid-August.
* Upper Peninsula (Marquette, Sault Ste. Marie): Last frost around June 1-15. First frost around September 15-25. Spring plant: late May to early June. Fall plant: late July to early August.
Always check with your local MSU Extension office for the most precise dates in your zipcode.
Choosing the Right Turnip Varieties for Michigan
Selecting varieties suited to our shorter springs and falls will boost your success. Look for types with faster maturity dates.
* Purple Top White Globe: The classic. Reliable, stores well, and matures in about 55 days. Great for both spring and fall.
* Hakurei (Salad Turnip): A sweet, crisp, white variety perfect for eating raw. Matures quickly in about 38 days, ideal for our spring window.
* Scarlet Queen: Vibrant red skin and sweet flesh. Ready in about 45 days, making it a good choice for successive plantings.
* Seven Top: Grown primarily for its delicious greens, though it does produce a small root. Very cold tolerant for late fall harvests.
Step-by-Step Planting Guide
Turnips are easy to grow from seed directly in the garden. Here’s how to do it:
1. Prepare the Soil: Choose a sunny spot (at least 6 hours of sun). Turnips prefer loose, well-drained soil. Work the soil to a depth of 12 inches, removing rocks and clumps. Mix in some finished compost, but avoid high-nitrogen fertilizers that will promote leafy tops over roots.
2. Sow the Seeds: Plant seeds about 1/2 inch deep. You can sow them in rows or broadcast them in a wide row. Space seeds about 1 inch apart in rows that are 12 to 18 inches apart.
3. Water Gently: Keep the seedbed consistently moist until seedlings emerge, which usually takes 4 to 7 days.
4. Thin the Seedlings: This is a crucial step. Once seedlings are a few inches tall, thin them to stand 3 to 6 inches apart. Crowded turnips won’t form good roots. You can eat the thinned greens!
Caring for Your Turnip Crop
Once established, turnips require minimal care.
* Watering: Provide about 1 inch of water per week. Even moisture is essential for preventing cracked roots and ensuring tender growth.
* Weeding: Keep the area weed-free, especially when plants are young. Weeds compete for nutrients and water.
* Pest Watch: In Michigan, flea beetles and cabbage root maggots can be a nusiance. Use floating row covers immediately after planting to protect young plants. Crop rotation from year to year also helps.
Harvesting and Storing Your Michigan Turnips
You can actually start harvesting earlier than you think.
* For Greens: You can snip a few outer leaves from each plant once they reach 4-6 inches tall. Never take all the leaves from one plant if you want a root to form.
* For Roots: Harvest spring turnips when they are young and tender, about the size of a golf ball (1-3 inches in diameter). Fall turnips can grow larger but are best harvested before they exceed 4 inches, as they can become tough. They sweeten after a light frost.
* Storage: For fall harvests, you can store turnips in a cool, humid place like a root cellar or a perforated plastic bag in the refrigerator. They can last for several months. Don’t forget you can also leave them in the ground under a thick layer of mulch and harvest them as needed until the ground freezes solid.
Common Problems and Solutions
Even experienced gardeners face a few issues. Here’s what to look for:
* Woody or Bitter Roots: Caused by hot weather or letting them grow too large. Stick to the planting windows and harvest on time.
* Cracked Roots: This is from inconsistent watering. Try to maintain even soil moisture.
* Poor Root Formation: Usually caused by overcrowding (not thinning), poor soil, or too much nitrogen. Ensure proper spacing and balanced soil fertility.
* Bug Damage: Small holes in leaves are often from flea beetles. Row covers are the best prevention method.
FAQs: Growing Turnips in Michigan
Can I plant turnips in the summer in Michigan?
It’s not recommended. Summer heat stresses the plants, leading to poor root development, bitterness, and more pest problems. Stick to spring and late summer plantings.
How long do turnips take to grow in Michigan?
Most varieties mature in 45 to 60 days from seed. This fast growth is what makes them perfect for our shorter cool seasons.
Can turnips survive a Michigan frost?
Yes, they are quite frost-tolerant. A light frost (28-32°F) actually improves the flavor of the roots. A hard freeze (below 28°F) will damage the tops, but you can often still harvest the roots if you act quickly.
Should I start turnip seeds indoors?
No, it’s not necessary and can disturb their root growth. Turnips transplant poorly. Direct sowing is always the best method.
What are good companion plants for turnips in my garden?
They grow well with peas, beans, and vining plants. Avoid planting them near other members of the cabbage family (like broccoli or kale) to help reduce pest and disease issues.
Getting your turnip planting right in Michigan is mostly about watching the calendar. By using the cool windows of spring and fall, you can enjoy two bountiful harvests of this versitile vegetable. With simple soil preparation and consistent care, you’ll be pulling up sweet, crunchy turnips in no time. Remember, the secret is in the timing, and now you have the schedule for success.